| 2026-07-12 | Noted example of oligopoly, in brief |
| 2026-06-23 | Grp. that adjusts oil production |
| 2025-10-31 | The U.A.E. is in it |
| 2025-10-21 | Major oil cartel, in brief |
| 2025-03-02 | Well-connected grp.? |
| 2024-10-06 | International grp. based in Vienna |
| 2024-04-08 | International grp. with many African members |
| 2024-02-21 | International oil grp. |
| 2024-02-06 | Grp. that Qatar left in 2019 |
| 2023-11-25 | Qatar left it in 2019 |
| 2023-10-15 | Oil industry acronym |
| 2023-10-06 | Noted example of oligopoly, in brief |
| 2023-09-27 | Intl. price-setting group |
| 2023-07-17 | Grp. with many Mideast members |
| 2023-06-11 | Grp. with barrels |
| 2023-06-01 | Crude letters |
| 2023-04-17 | Oil price-regulating grp. |
| 2023-02-19 | International grp. headquartered in Vienna |
| 2023-01-28 | Org. that has more members in Africa than in the Mideast |
| 2022-08-20 | Reserve group, in brief? |
| 2022-05-18 | Intl. group with members on three continents |
| 2022-01-26 | Major oil acronym |
| 2021-12-29 | International grp. founded in Baghdad in 1960 |
| 2021-11-22 | Intl. group that has no members in Europe or North America |
| 2021-09-22 | International grp. founded in 1960 in Baghdad |
| 2021-07-12 | International grp. with a 1970s U.S. embargo |
| 2021-07-09 | International grp. that's well financed? |
| 2021-06-08 | International grp. founded in Baghdad |
| 2020-12-07 | Grp. that sets oil benchmarks |
| 2020-11-17 | Big Mideast inits. |
| 2020-09-17 | Kuwait is a member of it, in brief |
| 2020-04-28 | Big oil cartel, in brief |
| 2020-04-19 | Europe-based grp. with no European members |
| 2020-03-16 | Intl. group of oil producers |
| 2020-01-05 | Intl. group founded in 1960 with five members |
| 2019-12-09 | Grp. with many Mideast members |
| 2019-12-04 | Equatorial Guinea is its least populous member, for short |
| 2019-10-22 | Grp. headquartered in Austria, which isn't a member |
| 2019-07-22 | Oil producers' grp. |
| 2018-11-08 | Grp. that's well-financed? |
| 2018-08-25 | Equatorial Guinea joined it in 2017 |
| 2018-07-16 | Oil grp. |
| 2018-05-23 | Grp. whose members have reserves |
| 2017-06-27 | Intl. group with two South American members and none in North America |
| 2017-06-05 | Oil cartel |
| 2017-01-16 | Grp. that includes Iraq and Qatar |
| 2016-11-23 | Crude letters? |
| 2015-11-19 | Well-funded grp.? |
| 2015-11-08 | Intl. group headquartered in Vienna |
| 2015-04-12 | Grp. that knows the drill? |
| 2015-01-31 | Carlos the Jackal raided its HQ |
| 2014-06-19 | What group founded in 1960 currently has 12 members? |
| 2014-06-11 | Intl. association since 1960 |
| 2014-04-29 | Indonesia joined it in 1962 ... and left in 2008 |
| 2014-04-27 | Big acronym in energy |
| 2013-10-27 | Well-financed grp.? |
| 2013-07-02 | Source of a 1973 crisis |
| 2013-03-13 | Grp. created at the Baghdad Conference, 1960 |
| 2012-12-02 | Grp. that has held summit meetings in Caracas and Riyadh |
| 2012-11-23 | Grp. that may call on its reserves? |
| 2012-08-31 | Ecuador is a member of it |
| 2012-08-13 | Oil cartel |
| 2012-08-01 | Crude acronym |
| 2012-06-10 | Grp. that includes Ecuador and Venezuela |
| 2012-04-30 | Crude group? |
| 2012-01-09 | Oil ministers' grp. |
| 2011-10-23 | 118-Across is in it |
| 2011-06-05 | Ecuador and Venezuela are in it |
| 2011-04-19 | Cartel formed in '60 |
| 2011-04-11 | Intl. oil group |
| 2011-03-16 | Cartel acronym |
| 2010-10-09 | Grp. that rolls out the barrels? |
| 2010-08-27 | Vienna-based grp. with no European members |
| 2010-07-26 | Source of some of the oil for 31-Down |
| 2010-03-21 | Its HQ are in Austria, which isn't a member |
| 2010-02-24 | Grp. including Nigeria and Venezuela |
| 2010-01-18 | Org. with many Mideast members |
| 2010-01-03 | Well-running group?: Abbr. |
| 2009-12-30 | Cartel led by a secretary general |
| 2009-05-01 | Venezuela is in it |
| 2009-02-01 | The U.A.E. is in it |
| 2009-01-29 | Crude letters? |
| 2009-01-12 | Grp. with clout at the gas pump |
| 2008-12-22 | Grp. in which many of the leaders wear robes |
| 2008-11-26 | Intl. price-setting group |
| 2008-05-25 | Ecuador and Venezuela are in it |
| 2007-06-10 | Barrel org. |
| 2007-01-18 | Crude group |
| 2006-05-14 | Group that includes the U.A.E. |
| 2006-03-29 | Grp. that has the world over a barrel? |
| 2006-03-01 | Fuel grp. |
| 2005-12-04 | Acronym since 1960 |
| 2005-10-26 | Crude group? |
| 2005-08-30 | Oil price-setting grp. |
| 2005-03-24 | Grp. founded in Baghdad, 1960 |
| 2005-03-20 | Grp. that includes Nigeria |
| 2005-02-13 | Trading grp. |
| 2004-08-04 | Crude org. |
| 2004-05-03 | Intl. oil group |
| 2004-03-30 | Oil grp. |
| 2003-10-22 | Vienna-based cartel |
| 2003-08-30 | Price-setting grp. |
| 2003-08-20 | Grp. with barrels |
| 2003-07-30 | Iran is a mem. of it |
| 2002-06-03 | Letters from the Persian Gulf? |
| 2002-05-23 | *Mideast ... pipeline ... embargo |
| 2002-02-18 | Oil cartel |
| 2002-01-28 | Oil grp. |
| 2001-11-26 | Assn. with many Gulf members |
| 2001-10-14 | Syndicate since 1960 |
| 2001-09-15 | Iraq is in it |
| 2001-08-30 | Kind of minister |
| 2001-08-02 | Grp. with crude interests? |
| 2001-03-26 | Oil grp. |
| 2001-03-14 | Crude bunch? |
| 2001-01-22 | Grp. that has energy users over a barrel? |
| 2001-01-01 | Crude group? |
| 2000-09-11 | Mideast-based grp. |
| 2000-08-19 | Indonesia is in it |
| 2000-05-01 | It controls a lot of U.S. imports |
| 2000-02-08 | Crude cartel |
| 1999-03-01 | Oil cartel |
| 1998-10-06 | Intl. acronym since 1960 |
| 1997-11-16 | The U.A.E. belongs to it |
| 1997-10-28 | Grp. affecting gas prices |
| 1997-06-19 | Trade grp. since 9/14/60 |
| 1997-02-20 | Noted cartel |
| 1996-12-19 | Group incl. the U.A.E. |
| 1996-07-04 | Meeting of ministers association |
| 1996-06-06 | Gas shortage manipulators |
| 1996-05-04 | Grp. making barrels of money? |
| 1995-10-19 | Notorious price controllers |
| 1995-10-12 | Cartel since 1960 |
| 1995-10-08 | Unpopular org. in the '70s |
| 1995-08-06 | Crude group? |
| 1995-06-30 | Org. since 1960 |
| 1995-04-06 | Fuel price setter, for short |
| 1994-12-18 | "Well"-financed grp. |
| 1994-05-05 | Well-oiled grp. |
| 1994-04-14 | Acronym since 1960 |
| 1994-01-16 | Acronym in 70's news |
| 1993-12-15 | Grp. founded in 1960 |